I have just updated the spec with a couple of minor changes:- Corrected []-typo for the image buffer of thumbnail messages- Style fix of logo and removed the "protocol stack" illustration that didn't come out right anyway

Changes: - The OMEX chapter has been removed as it never took flight. - Removed all 'struct' keywords as they were misguiding. - Change of PINF/PLoc multicast address. - Added new SDMX Capapabilities, Channel List and Set External Universe Source messages.